Is respond a noun

Answer 1

Yes, the word 'respond' is a noun used in the field of architecture, a word for a half-pillar or half-pier attached to a wall to support an arch; a word for a thing.

The noun forms of the verb to respond are responder, response, and the gerund, responding.

Answer 2

No, "respond" is a verb. It is an action word that describes the act of replying or reacting to something.